Car-door mounting



G. E. KNEPPEH. I CAR DOOR MOUNTING.

APPLICATION ,HLED APR. 5. 1921.

1 ,397 ,811 1 Patented Nov. 22, 1921.

gwuawtoz PATENT OFFICE.

GEORGE E. KNEEPEB, 0E ALTGONA, 1?ENN$YLVANIA.

GAR-DOOR ISEUUNTING.

Application filed April 6, 1921.

To all whom it may concern:

Be it'known that GEORGE E. Knnrrnn, a citizen of the United States, residlng at Altoona, in the county of Blair and State of Pennsylvania, has invented certain new and useful Improvements in Car-Door Mountings, of which the following is a specification.

This invention relates to an improved mounting for car doors of the type used on freight box cars.

One of the objects is to provide an improved door support or hanger bracket having therein a spiral roller adapted to rotate upon opening or closing the door.

Another object of the invention is to provide roller means which causes the door on being opened to first move away from the side of the car which will allow the same to move freely and not scrape the car side, which is a common fault with a great many car doors.

A further object of this invention is to provide a car door support which will permit the doors to be easily moved, while at the same time providing sufficient friction to prevent the door being jammed when opening and closing, this being a fault in most door supporting means in which roller bearings are used having their axis at right angles to the plane of the door.

With the above and other objects in view which will be more readily apparent as the nature of this invention is understood the same consists in the novel construction, combination, and arrangement of parts as will be hereinafter more fully pointed out illustrated and claimed.

It will of course be understood by those skilled in the art to which this invention belongs that the same is susceptible to some structural changes and modifications without departing from the spirit or scope of the invention, but a preferred and practical embodiment of the invention is shown in the accompanying drawings in which Figure 1 is an elevation of a car door having my improved door hanger applied thereto.

Fig. 2 is an enlarged vertical sectional view of a part of the door with my improved hanger shown in position on the car door hanger track.

Fig. 3 is a perspective view of my improved hanger having the spiral roller positioned therein.

Specification of Letters Patent.

Patented Nov. 22, 1921. Serial No. 459,112.

Fig. 4 is a top plan view of a modified bracket in which the axis of the spiral is set at an angle transversely to the path of travel of the door.

Similar reference numerals refer to similar parts throughout the several figures of the drawings.

In carrying out this invention no change is contemplated in the usual construction of the car door, designated in its entirety by the numeral 10, the door 10 is provided with a plurality of hanger brackets 11, in each of which is positioned a roller 12 having a spiral groove 13 cut therein.

The periphery of the roller 12 having the spiral groove therein presents an interrupted line contact with the door roller support 14. The surface 15 of the support 14 being rough offers some resistance to the roller when the door is pushed in either direction and the roughened surface engaging with the edges 16 of the spiral groove 13, as the door is moved, causes the roller 12 to rotate such as to draw the door away from the side of the car when the same is opened. The action of this spiral in rotating is such that the door cannot be easily run back against the door stop thus doing damage to the door and also the door stop. In other words the rotation of'the worm roller has a tendency to feed the door away from the side of the car.

In the type of bracket and spiral shown in Fig. 4 of the drawings, the spiral 16 is set at an angle to the hanger arm 17, that is oblique to the path of travel of the door. This construction permits the spiral to rotate more easily and quite obviously the door to which it is attached will be opened and closed more easily than when the axis of the spiral 16 is parallel to the plane of the door 10. I

It will be quite readily noticed that this spiral roller can be placed at the bottom of the door in a bracket 18, through some slight modifications and changes in the bracket, but the door .10 is provided with the usual door alinement pads 19, which are adapted to move in a guide parallel to the door.

For. the purpose of holding the spiral roller 12 in the bracket 11 thereis provided a bolt 20, or equivalent means, adapted to pass through wings 21, in the bracket and hold the spiral-in operative relation with the door 10, and track 14. The bracket 11 is adapted to be held to the door 10 through the usual bolts which pass through drilled holes and the door, thus holding the two firmly together.

I claim:

1. A car door hanger including a traction roller having a spiral tread surface.

2. A car door hanger including a bracket, a roller positioned therein and having a spiral groove out in the roller, and means for holding the roller in the bracket.

3. A car door hanger including a bracket secured to the door and having a roller provided with a spiral groove positioned therein, and means for positioning the axis of the roller parallel with the plane of the door.

a. A car door hanger including a supporting bracket secured to the door, a cylindrical roller in the bracket, spiral grooves cut in the surface of the cylinder forming the roller and means for positioning the axis of the roller at an angle with the plane of the door.

5. A car door hanger including a bracket for supporting the door, a cylindrical roller having a spiral groove out in the surface ture.

GEORGE E. KNEPPER. 

